Improve config package names and reduce API exposure.

api/konfig/general.go

@@ -0,0 +1,33 @@
+// Copyright 2019 The Kubernetes Authors.
+// SPDX-License-Identifier: Apache-2.0
+
+package konfig
+
+// RecognizedKustomizationFileNames is a list of file names
+// that kustomize recognizes.
+// To avoid ambiguity, a kustomization directory may not
+// contain more than one match to this list.
+func RecognizedKustomizationFileNames() []string {
+	return []string{
+		"kustomization.yaml",
+		"kustomization.yml",
+		"Kustomization",
+	}
+}
+
+func DefaultKustomizationFileName() string {
+	return RecognizedKustomizationFileNames()[0]
+}
+
+const (
+	// An environment variable to consult for kustomization
+	// configuration data.  See:
+	// https://specifications.freedesktop.org/basedir-spec/basedir-spec-latest.html
+	XdgConfigHomeEnv = "XDG_CONFIG_HOME"
+
+	// Use this when XdgConfigHomeEnv not defined.
+	XdgConfigHomeEnvDefault = ".config"
+
+	// A program name, for use in help, finding the XDG_CONFIG_DIR, etc.
+	ProgramName = "kustomize"
+)